NYC PUBLIC HEALTH LAB  455 1st Avenue  Manhattan
Our initial survey revealed that there were over 400 potentially hazardous stone panels loosening from the steel and CMU columns due to weather-related deterioration of the original anchoring system. We considered various options for re-cladding the building, such as installing an entirely new metal panel facçade. Our architects and engineers developed an innovative solution utilizing a combination of stud-welding and masonry anchors to re-stabilize the original stone. Our design and specifications were implemented and proved extremely cost-effective, saving the City several million dollars. Executed in two phases, this restoration involved selective stone replacement and re-anchoring, concrete repairs at the roof level promenade, reroofing, new metal copings on all parapets, and the replacement of brick veneer panels. Upon completion, we submitted the LL11/98 FISP report to NYC-Department of Buildings re-classifying the building as safe.